Minimalist Single-Line Social Media Avatar

Please convert the input image into a minimalist single-line illustration suitable for use as a social media avatar, default aspect ratio 1:1. The subject can be a person, cat, dog, other animal, or plant. Based on the input subject type, automatically extract the most recognizable outer contour and key features, and condense them into an artistic minimalist single-line avatar / character illustration. The overall goal is not mechanical outlining, but to preserve the subject’s spirit and recognizability, using a more elevated, more spirited approach to single-line reconstruction.【Subject Processing Logic】If the subject is a person: preserve key contours such as face shape, forehead, nose bridge, mouth turns, chin, ears, hairstyle, etc., retaining only a small number of necessary facial features and avoiding fragmented detail. If the subject is a cat, dog, or other animal: preserve key identifying features such as head shape, ears, muzzle contour, eye expression, and the overall flow of fur, avoiding complex fur details. If the subject is a plant: preserve the most recognizable morphological features among flowers, leaves, branches, fruit, or the overall silhouette, using concise lines to summarize its posture and sense of rhythm.【Line Style Requirements】Lines must be smooth, rounded, expansive, expressive, natural, as continuous as possible, done in one flowing stroke, with a sense of breath and improvisation. The overall emphasis should be on soft curves, with fewer sharp, stiff, rigid broken lines. Do not draw the contour as a rigid logo-style outline; do not make it mechanical, stiff, fragmented, or overly regular. Lines should be concise but alive, with a bit of casualness and artistic temperament, looking relaxed, nimble, and collectible.【Composition and Avatar Fit Logic】The overall composition should be designed as a 1:1 square, with the subject clear, concentrated, and eye-catching, suitable for use as a social media avatar. The subject is recommended to be centered or slightly off-center, with a complete contour and clear visual focus. Please leave reasonable negative space, avoid the subject being too large or touching the edges, and ensure that even after circular cropping for an avatar, the key parts of the subject remain complete, clear, and highly recognizable. The image should remain concise, strong, and easy to identify even at small sizes.【Background Color Logic】The background color should not be fixed to one color, and should not default to blue. Please prioritize extracting a suitable 'dark tone logic' for the background based on the overall color temperament of the input image itself, choosing an appropriate background color from dark tendencies related to the subject. If the user explicitly specifies a background color, prioritize the user-specified color, and on that basis maintain an overall high-end, restrained, and tension-filled dark tone treatment. Background color selection should follow these principles:- Primarily use solid dark, pure backgrounds with emotional tension- The background should effectively set off the subject's lines and create clear contrast- Do not fix a single hue; flexibly choose dark tones such as deep blue, deep green, deep purple, deep brown, deep gray, wine red, ink black, blue gray, olive dark, etc. according to the image's temperament- If the image itself suits a cool background, use a cool dark tone logic- If the image itself suits a warm background, use a warm dark tone logic- If the user specifies a color, choose a more subdued, more avatar-display-appropriate dark version based on that color- Avoid fluorescent feel or cheap vividness- Avoid gray, dull, dirty, low-contrast, lifeless backgrounds【Subject Line Color Logic】For the subject's main contour lines, it is recommended to use thin white lines, or thin light-colored lines that form strong contrast with the background. Lines should not be too thick, nor so thin that they lose presence; they should be light, clear, and clean. If the background is relatively dark, prioritize white or light warm-white lines to enhance recognizability and a fresh feel.【Accent Element Logic】Add a small number of random, improvised, natural small colorful accent elements around the subject to enhance spirit, fun, and a relaxed feel. Accent elements can be: small dots, small arcs, small stars, small smiley faces, small short strokes, small lightning bolts, simple geometric symbols, etc. The accent style should be rounded, playful, relaxed, and natural, like inspiration decorations added casually, rather than template elements deliberately laid out. Accents must be properly controlled:- Few in number, just enough- Naturally distributed, with a slight random feel- Not too dense, not too rigidly symmetrical- Do not overpower the subject- Exist only as auxiliary atmosphere- Accent colors can be extracted sparingly from adjacent or complementary color logic of the background color, and a small amount of pop colors can also be used, such as yellow, orange, pink, light purple, light coral, etc.- Accents should overall coordinate with the subject and background, and not appear like rigid collage【Overall Style Goal】The overall image should be minimalist, light, modern, nimble, and have an artistic temperament. It should have both the clean feel of single-line illustration and the relaxed, vital feel of improvised doodling. Make the subject appear rounded, expansive, and expressive, rather than stiff, dull, or templated. The final effect should be suitable as a social media avatar: eye-catching, recognizable, interesting, and design-forward, while also possessing a relaxed, pleasant, naturally vivid, collectible artistic temperament.【Problems to Avoid】Do not be realistic, do not use shadows, do not use light-and-shade volume, do not use complex textures, do not use complex scenes. Do not use mechanical outlining, do not be stiff or rigid, do not be sharp or harsh, do not be overly regular. Do not fix the background color into a single blue template. Do not make the background too bright and glaring, nor gray, dull, and lifeless. Do not over-decorate, do not steal attention from the subject. Do not lose spirit because of minimalism, and do not lose restraint because of decoration. Ratio 16:9